Locomotive boiler



Nov. 11 1924.

J. J. CAIN LOCOMOTIVE BOILER Filed June 2, 1922 3 Sheets-Sheet l O O O 33mg EL@ @Hom/m13 Nov. l1 1,514,685

Y J. J. CMN

LOGOMOTIVE BOILER Filed June 2, 1922 3 Sheets-Sheet 2v llllll-vlllllllm @mom/toc I 35% 1u; @brom/m J. J. CAIN LOCOMOTIVE BOILER l Nov. 11 AQZ.

Patented Nov. 11, 1924.

* e rc JOHN J. GAIN, OF BAYNNE, NEW JERSEY.4

Locorao'rrvn Bomen.

Aplaicauon sied rune 27 1922.1 seriai No. 565,348.

To all 'whom 'it may concern.'

` Beit known that I, JOHN J. Cairn a citizen of the United States, and a resident of Bayonne, county of Hudson, State of New Jersey, have invented-new and useful lmprovements in Locomotive Boilers, of which the following is a specification.

This invention relates to that class of locomotive boilers described in'fmy application for Letters Patent filed Sept. 25, 1920, under Serial Number 412,806, which comprises narrow hollow sections adequately spaced apart and whoseface areas are substantially equal to that -bounded by the transverse dimensions of the available spacey above the running gear of ithelocomotive.

An object of the invention is to provide a mud chamber at each side of, extending the full length of the boiler and connected to the water legs of the transverse sections: said lconnections being of such a character as to relieve the connecting nipples'of all lateral yshocks and strains, the 'saidf nipples, when duly expanded, acting to resistrpressures tending to separate theflanges andrecesses and as communicatingl passagesbetween the mud chambers and the sections.

Another object is to strengthen th'efbase l of the vboiler by providing transverse chambers located between and suitably connected, by nipples, to the mud chambers, said transverse chambers having blow-off -outlets at their central portions, whereby both sides of the boiler may be simultaneously blown oil or cleaned.

A 'further object isto facilitate the How of the products of combustion from the furnace and to prevent ashes, &c., lodging on the tops of the transverse sections; tov this end the upper and under edges of the sections are bevelled or rounded from their front and rear faces to planes passing flatwise centrally through the sections.

The novel features of the boiler of this invention are illustrated in the accompanying drawings, in which:

Fig. 1, is a longitudinal vertical secton illustrating the main features of the invention.

Fig. 2, is a plan view, one half of which shows the top of the boiler and the other half the base of the boiler.

Fig. 3, is an enlarged sectional view showing more particularlyfthe arrangement of the superheater sections.

Fig. et, is a transverse section of the boiler, taken on the line et, t, Fig. 3.

Fig. 5, is a vertical section of two of the transverse boiler sections, taken on the line 5, 5, Fig. 1, showing the improvements in the construction of the same, and

Fig. 6. is an kenlarged sectional view of one of the `flanged connectionsbetween a water lego'ta transverse section and a longitudinal mud chamber.

The'narrow hollow transverse sections 7, 7,-'the equalizing drum 8, located at their central upper parts and the connecting nipples 9, 9, are essentially similar to the c orresponding parts of my beforeementioned application. u y 'u The transverse sections, including all ot the' steaming sections 7, 7, `and thev super-ul heating sections 10, and 11, are alike structurally and lhave' supporting legs I12, by which they are securely fastened to side mud chambers 13, which extend the full length of the boiler. These mud chambers'l are tied together by bracing transverse chambers 14, 14, having nipple connections at their ends with the inner sidesy of the mud chambers and whichr provide free passages between them through the nipples 15, 15; said mud chambersl and transverse chambers 14e, 14,' constitutingV the base of the boiler. 'Both sides of' the boiler may by this arrangement be simultaneously blown out, by applying to the 'central part of each transversechaniber 14, a discharge pipe 16; all of these pipes 16 may connect with a main discharge pipe or'each-'one may be provided with a blow-oil cock 17.

In Fig. G is shown the method adopted for providing rigid connections between the water legs and the mud chambers, which consists in forming on the bottom of each water leg 12 a downwardly projecting flange 18, shaped to lit into a recess 19, formed in the upper surface of the mud chamber 13, said flange and recess being'preferably circular and concentric with the nipple holes in the water leg and chamber, so they may be tooled at the same time the said holes are. The nipples 2O may be applied and eX- panded in place through hand holes 21; intimate connections between the nipples and the holes being assured by providing clearances for the nipples in the interior of the flanges 18. By this construction it is seen that the nipple is protected against lateral FIJ shocks and strains, its only function being to hold the parts together against vertical separation and provide a passageway between the mud chamber and water leg. All of the water' legs are in this manner fastened to the 'mud chambers, the nipples of the superheater sections being suitably closed, as for instance by plugs they necessarily being cut ol from the interior of the boiler below the water line.

'The improvement in the vertical transverse sections included in this invention consists in making the lower edges of the sections between the water legs and their upper edges taper in form, as clearly shown on Fig. 5, that is by bevelling them from their front and rear faces to planesV passing centrallyv flatwise through the sections, as shown ,at 22 and 23 respectively in Fig. 5. These bevelled edges allow the hot products of combustion to freely enter the heating passages between the sections, which are adequately spaced apart, and those at lthe tops of the sections also prevent the accumulation of ashes, &c., thereon.

The sections used as superheaters are in all essentialrespects similar to the steaming sections, they may be of any suitable number and belocated in any desirable part of, the boiler. As `shown two, l() and l1 are i used, vconnected by nipples to the other parts of the boiler vas are the steaming sections,

Y all of said superheater nipples, with the eX- ception of those enteringtheir upper parts throttle valve 27 to the front end'ot the locomotive. Y

Steam from4 all of the steami-ng sections T enter the drum 8, thence through the dry pipe 25 to the section l0, down this section through nipples 24 into section il, and passes from this superheater section to the throttle valve 27'.

i 31,' designatesr safety valves lying alongthe top of the boiler and in communication with the front end of the dry pipe 25.

r;l`he furnace back wall 32 directs the gases from the tire on the grate 33 up between the first set of sections to the upper part of the boiler, where the baiile wall 34: directs them downwardly between the ynext se-t of sections, from which they' iiow to be directed upwardly by the battle wall 35 and again from the top of the boiler down between the last set kof sections into the smoke box 36, from which they escape through the chimney 37.

I. claim,- f

-A locomotive boiler, .comprising narrow hollow sections transversely arranged, havand lextending the full length of the boiler,

nipple connections between the water legsy and said chambers, transverse bracing chambers ,connected at their ends to the inner sides of and spaced apart throughout the length of thelongitudinal chambers and a 'blow-oill connection located at the lcentr-al* part of eachl of the transverse chambers, whereby all parts of a longfboiler at both of its sides may be uniformly adequately cleaned. v y

Signed atl New York, county and State of New York, this 25th day of May, 1922. JOHNJ. GAIN. In the presenceof- JAMES A. HUAM, J. C. LAWRENCE.' 

